Portion of a shoe midsole



FIG. 1 is a front perspective view of one side of a portion of a shoe midsole showing my new design;

FIG. 2 is a side elevational view of one side thereof;

FIG. 3 is a rear perspective view of one side thereof;

FIG. 4 is a front perspective view of the other side thereof;

FIG. 5 is a side elevational view of the other side thereof;

FIG. 6 is a rear perspective view of the other side thereof; and,

FIG. 7 is a rear elevational view thereof.

The uneven broken line immediately adjacent to the shaded areas represents an unclaimed portion of the boundary of the design. The uneven broken line showing the remainder of the shoe sole and shoe upper is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portion of a shoe midsole, as shown and described. 